Jus to keep us all in the loop as a great diy crossover develops here's a useful link.
I've just been shooting the breeze with a key designer on the subject of how to best arrange an active crossover.
I would say that with a little more gentle stiring of the pot and we should see something slide out of the wood work soon enough.
http://www.diyaudio.com/forums/showt...920#post265920
over and out
Ian